Description

Genuine OEM Yanmar sacrificial anode (part number 120650-18530) designed to protect your engine’s cooling system from galvanic corrosion. This factory-spec zinc or magnesium anode sacrifices itself to prevent corrosion damage to expensive engine components, extending the life of your heat exchanger, oil cooler, and other cooling system parts.

Key Features:

• Genuine Yanmar OEM part – exact fit and performance
• Part Number: 120650-18530
• Sacrificial metal protects critical engine components
• Prevents galvanic corrosion in cooling system
• Extends life of heat exchangers and coolers
• Essential corrosion protection for marine engines
• Direct replacement for routine maintenance

How Sacrificial Anodes Work:

In marine environments, dissimilar metals in contact with seawater create galvanic corrosion that can destroy expensive engine components. Sacrificial anodes are made from metals that corrode preferentially, protecting more valuable parts like bronze heat exchangers, aluminum housings, and steel components. As the anode corrodes, it prevents corrosion of critical engine parts.

Maintenance Schedule:

Inspect anodes regularly and replace when 50% depleted. Yanmar recommends checking anodes at each oil change and replacing them at least annually, or more frequently in saltwater applications. Never allow anodes to corrode completely, as this leaves your engine unprotected. Anodes that appear painted, coated, or discolored may not be functioning properly and should be replaced.

Installation Tips:

Ensure the anode makes good electrical contact with the engine block or component it’s protecting. Clean the mounting threads and surface before installation. Do not use thread sealant or anti-seize compounds that could insulate the anode. Torque to manufacturer specifications – overtightening can damage threads, while undertightening prevents proper electrical contact.

Saltwater vs. Freshwater:

Different anode materials are used for saltwater (zinc) versus freshwater (magnesium) applications. Verify you’re using the correct anode type for your operating environment. Using the wrong anode material can result in rapid depletion or ineffective corrosion protection.

Compatibility:

Verify this part number matches your engine’s requirements before ordering. Consult your Yanmar engine manual or parts diagram for your specific model, or contact technical support if you need assistance confirming compatibility.

Protect your Yanmar diesel investment with this genuine OEM sacrificial anode. Inexpensive insurance against costly corrosion damage – keep spares on board for regular replacement.